Which layover airport has the shortest travel time from Helena to London?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 00m.

Which airport is the most popular layover for flights between Helena and London?

Denver (DEN) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Helena to London?

Denver (DEN) has the shortest average layover time for this route: 1h 15m.

Which layover airport offers the lowest fares from Helena to London?

Flights via Salt Lake City (SLC) offer the lowest average round-trip price of $589.

When did momondo last update prices for flights from Helena Airport to London?

Prices for flights from Helena Airport to London were last updated today.

How old do you have to be to fly from Helena Airport to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$609 Cheap Flights from Helena to London in 2025/26

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Find the cheapest flights from Helena to London

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Cheap round-trip flights

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6:40 am - 9:40 amHLN-LHR

20h 00m1 stop

4:40 pm - 1:27 pmLHR-HLN

51h 47m2 stops

$629United Airlines

Find Deal

Mon, Nov 10 - Mon, Nov 17

2:22 pm - 9:40 amHLN-LHR

12h 18m1 stop

11:35 am - 9:22 pmLHR-HLN

16h 47m1 stop

$699United Airlines

Find Deal

Mon, Nov 10 - Mon, Nov 17

6:15 am - 9:40 amHLN-LHR

21h 25m1 stop

7:30 am - 8:59 pmLHR-HLN

20h 29m2 stops

$788United Airlines

Find Deal

Fri, Mar 27 - Tue, Mar 31

6:15 am - 8:30 amHLN-LHR

20h 15m2 stops

7:30 am - 8:59 pmLHR-HLN

20h 29m2 stops

$794United Airlines

Find Deal

Fri, Mar 27 - Tue, Mar 31

2:30 pm - 9:40 amHLN-LHR

13h 10m1 stop

11:25 am - 8:59 pmLHR-HLN

16h 34m1 stop

$894United Airlines

Find Deal

Fri, Mar 27 - Tue, Mar 31

2:30 pm - 9:40 amHLN-LHR

13h 10m1 stop

9:30 am - 8:59 pmLHR-HLN

18h 29m2 stops

$926United Airlines

Find Deal

Fri, Mar 27 - Tue, Mar 31

2:30 pm - 9:40 amHLN-LHR

13h 10m1 stop

2:50 pm - 8:59 pmLHR-HLN

13h 09m1 stop

$944United Airlines

Find Deal

Fri, Mar 27 - Tue, Mar 31

6:30 am - 9:40 amHLN-LHR

20h 10m1 stop

4:20 pm - 1:45 pmLHR-HLN

28h 25m2 stops

$1,155United Airlines

Find Deal

Sat, Dec 13 - Sat, Dec 20

5:45 am - 9:30 amHLN-LCY

44h 45m2 stops

9:20 am - 10:34 pmLCY-HLN

44h 14m2 stops

$1,276Delta

Find Deal

Thu, Apr 16 - Mon, Apr 20

5:45 am - 8:10 amHLN-LCY

43h 25m2 stops

8:40 am - 10:34 pmLCY-HLN

44h 54m2 stops

$1,301Delta

Find Deal

Thu, Apr 16 - Mon, Apr 20

United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets

United Airlines

Nov 10

HLN6:40 amHelena

20h 00m

1 stop

LHR9:40 amLondon Heathrow

Nov 17

LHR4:40 pmLondon Heathrow

51h 47m

2 stops

HLN1:27 pmHelena

$629

Find similar

United Airlines

Nov 10

HLN2:22 pmHelena

12h 18m

1 stop

LHR9:40 amLondon Heathrow

Nov 17

LHR11:35 amLondon Heathrow

16h 47m

1 stop

HLN9:22 pmHelena

$699

Find similar

United Airlines

Mar 27

HLN6:15 amHelena

21h 25m

1 stop

LHR9:40 amLondon Heathrow

Mar 31

LHR7:30 amLondon Heathrow

20h 29m

2 stops

HLN8:59 pmHelena

$788

Find similar

Delta flights from Helena to London

Our best Delta deals on Helena to London flight tickets

Delta

Apr 16

HLN5:45 amHelena

44h 45m

2 stops

LCY9:30 amLondon City

Apr 20

LCY9:20 amLondon City

44h 14m

2 stops

HLN10:34 pmHelena

$1,276

Find similar

Delta

Apr 16

HLN5:45 amHelena

43h 25m

2 stops

LCY8:10 amLondon City

Apr 20

LCY8:40 amLondon City

44h 54m

2 stops

HLN10:34 pmHelena

$1,301

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaLondon

HLN - LHR

HLNLHR

Helena

Mon 11/10

6:40 am-9:40 am

1 stop20h 00m

London Heathrow

Mon 11/17

4:40 pm-1:27 pm

2 stops51h 47m

$629

HelenaLondon

HLN - LHR

HLNLHR

Helena

Mon 11/10

2:22 pm-9:40 am

1 stop12h 18m

London Heathrow

Mon 11/17

11:35 am-9:22 pm

1 stop16h 47m

$699

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 3/27

6:15 am-9:40 am

1 stop21h 25m

London Heathrow

Tue 3/31

7:30 am-8:59 pm

2 stops20h 29m

$788

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 3/27

6:15 am-8:30 am

2 stops20h 15m

London Heathrow

Tue 3/31

7:30 am-8:59 pm

2 stops20h 29m

$794

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 3/27

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

11:25 am-8:59 pm

1 stop16h 34m

$894

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 3/27

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

9:30 am-8:59 pm

2 stops18h 29m

$926

HelenaLondon

HLN - LHR

HLNLHR

Helena

Fri 3/27

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

2:50 pm-8:59 pm

1 stop13h 09m

$944

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 12/13

6:30 am-9:40 am

1 stop20h 10m

London Heathrow

Sat 12/20

4:20 pm-1:45 pm

2 stops28h 25m

$1,155

HelenaLondon

HLN - LCY

HLNLCY

Helena

Thu 4/16

5:45 am-9:30 am

2 stops44h 45m

London City

Mon 4/20

9:20 am-10:34 pm

2 stops44h 14m

$1,276

HelenaLondon

HLN - LCY

HLNLCY

Helena

Thu 4/16

5:45 am-8:10 am

2 stops43h 25m

London City

Mon 4/20

8:40 am-10:34 pm

2 stops44h 54m

$1,301

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Helena to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Layovers

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from Helena to London is on a Monday. Travelers who choose to depart for London on a Monday will often find tickets for as low as $744. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,268. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

When to book flights from Helena to London

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Helena to London (HLN to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to London

Direct flights	None

There are no direct flights from Helena to London. There are no popular flight routes from Helena to London.

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How far is Helena to London by plane?
Helena and London are 4547.6 mi apart from one another. In terms of flight time, this usually takes a little over 12h 10m.
When did momondo last update prices for flights from Helena Airport to London?
Prices for flights from Helena Airport to London were last updated today.
How old do you have to be to fly from Helena Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Helena to London?
momondo data reveals that the most frequently booked airline on the route from Helena to London is United Airlines, representing 100% of all bookings.

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Chelmsford

Folkestone

Romford

Ilford

Cobham

Wembley

Stansted

Watford

Harrow

Why use momondo?

Why should I use momondo to find a flight deal from Helena to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Helena to London with flexible booking policies on momondo?

Yes. All flights to London from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Helena to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to London.

I’m not ready to book a flight from Helena to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Helena and alert you when they change.